SeaPerch Remotely Operated Vehicle, Construction Manual, Page: 59 / 110

OPTIONAL PROCEDURE 2.6A
– FILM CANISTERS & ALTERNATE MOTOR 1
SeaPerch ROV Construction Manual
– Version 2010-04NW
2.6-2
Figure 2.6-2: Drill Bit Used to Clear a
Motor Shaft Hole in a Thruster Housing
CLOGGED HOLE
CLOGGED HOLE
DRILL BIT
PASSED THROUGH
HOLE FROM INSIDE TO CLEAR
DRILL BIT
PASSED THROUGH
HOLE FROM INSIDE TO CLEAR
CLOGGED HOLE
CLOGGED HOLE
DRILL BIT
PASSED THROUGH
HOLE FROM INSIDE TO CLEAR
DRILL BIT
PASSED THROUGH
HOLE FROM INSIDE TO CLEAR
Procedure 2.6 – Pot (Waterproof) the Motors with Wax
Tools:
Metal Cup(s)
Electric Skillet
Potting Holder
Scissors
Apron / Gloves (Optional)
Materials:
3 Motors Sealed with Tape
3 Film Canisters and Caps
with Holes Drilled (from
Procedure 2.4)
Wax Bowl Ring (~½ Ring
Needed Per ROV)
Electrical Tape
Petroleum Jelly
Water and Paper Towels
Figure 2.6-1: Motor Waterproofed by Potting in Wax
NOTE: Each motor will be potted into its thruster housing using melted wax, as shown
in Figure 2.6-1. Wearing an apron and using protective gloves is recommended during
the potting process. Review the wax-melting tips on page 2.6-1 before proceeding.
Construction Steps:
1. Check the shaft hole in each thruster
housing to ensure that it is clear of any
plastic burrs. Dry-
fit a motor’s shaft,
from the outside of each housing, to
ensure that it fits into the hole, but is
not too tight. A shaft fits properly when
the motor will slowly fall out when the
housing is held with the motor below it.
If the hole is obstructed or the shaft is
too tight, simply pass a 5/64” drill bit
straight through the hole, from the
inside of the housing, a few times
(without twisting it) as needed to
correct the problem. See Figure 2.6-2.